Milwaukee 49-22-4005 General Ice Hardened Kit, 8-Piece N/A Made in USA The product is easy to use The product is durable The product is manufactured in United States Ice Hardened cryogenically treated for up to 50% longer life Optimized tooth form for up to 2X faster cutting Wide, angled & offset slots for easy plug access Bi-metal construction with 8% cobalt for increased wear resistance Includes: (5) Hole Saws,(1)Twist-Release Arbor with Pilot Bit, (1) Additional Pilot Bit: 49-56-8010, (1) 1/8" Hex Key, (1) Adapter: 49-56-6560.